How to call one function from another function in express.js?

Question

exports.usersignup= function(req, res) {
console.log('user signed up working')

}
exports.addcustomer= function(req, res) {
console.log('customer added')

}

I have two function which is exports.usersignup and exports.addcustomer .when i call exports.usersignup function it should call exports.addcustomer function and it should work the given logic how can i get this done any one help me out.pls dont give down vote i already tried but its not working

pass **next** variable in the usersignup function and when you want to call addcustomer just use **return next()** statement ; — Atul Agrawal, May 24 '16 at 09:15
exports.usersignup= function(req, res,next) { console.log('user signed up working') return next(); } — Atul Agrawal, May 24 '16 at 09:17
then just change it to app.route('/auth/usersignup').post(users.usersignup,users.addcustomer); and don't forget to write usersignup as i mention in above comment — Atul Agrawal, May 24 '16 at 09:19

score 3 · Answer 1 · answered May 24 '16 at 09:32

3

Here is a naïve solution:

exports.usersignup = function (req, res) {
  console.log('usersignup')
  exports.addcustomer()
}

exports.addcustomer = function (req, res) {
  console.log('addcustomer')
}

A better solution would be to utilize Express middleware:

// customer.js
// ...

exports.usersignup = function (req, res, next) {
  console.log('usersignup')
  next()
}
exports.addcustomer = function (req, res) {
  console.log('addcustomer')
}

// app.js
// ...

var express = require('express')
var customer = require('./customer.js')
var app = express()
app.post('/user', customer.usersignup, customer.addcustomer)

answered May 24 '16 at 09:32

Alex Booker

10,487
1
24
34

this is a better way, but when you are doing db operations like ```addcustomer``` then it should be in different ```.js``` file which could be imported where ever it is required and used rather than passing next() for saving the user. – Nivesh May 24 '16 at 09:54
i want to pass req.body to customer – May 24 '16 at 10:34
1

i am getting error F:\meanjs\node_modules\aws-sdk\lib\request.js:31 throw err; ^ Error: Can't set headers after they are sent. at ServerResponse.OutgoingMessage.setHeader (_http_outgoing.js:346:11) at ServerResponse.header (F:\meanjs\node_modules\express\lib\response.js:666:10) at ServerResponse.send (F:\meanjs\node_modules\express\lib\response.js:146:12) – May 24 '16 at 10:42
@komal You'll get that error if you call `res.json`/`res.sendStatus` or a similar function in _both_ functions. – Alex Booker May 25 '16 at 08:19
@komal Please update your question with a [SSCCE](http://sscce.org/) and I'll try to help you. – Alex Booker May 25 '16 at 13:12

score 0 · Answer 2 · answered May 24 '16 at 09:22

0

pass next variable in the usersignup function and when you want to call addcustomer just use return next() statement

answered May 24 '16 at 09:22

Atul Agrawal

1,474
5
22
41

pls give full answer – May 24 '16 at 09:36
You can use @Alex Booker's answer because me answer is same as he mentioned above – Atul Agrawal May 24 '16 at 10:06
if needed then we can take this conversation in chat – Atul Agrawal May 24 '16 at 10:08
i want to pass req.body to customer function – May 24 '16 at 10:34
F:\meanjs\node_modules\aws-sdk\lib\request.js:31 throw err; ^ Error: Can't set headers after they are sent. at ServerResponse.OutgoingMessage.setHeader (_http_outgoing.js:346:11) at ServerResponse.header (F:\meanjs\node_modules\express\lib\response.js:666:10) at ServerResponse.send (F:\meanjs\node_modules\express\lib\response.js:146:12) i am geting error – May 24 '16 at 10:42
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/112778/discussion-between-atul-agrawal-and-komal). – Atul Agrawal May 24 '16 at 11:40

How to call one function from another function in express.js?

2 Answers2